Thirds to philip van volkenburgh



3 S A E 0 V A TH E (-No Model.)

Patented May 13, 1890.

milzss 555;

m m Km hi E W s @Q Y Q MW (N0 Model.) 3 Sheets-Sheet 2.

0. W; THOMAS.

, SHEAVB.

No. 427.810. Patented May 13 1890.

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(Nb Model) 7 C. W. THOMAS.

SHEAVE.

No. 427,810. Patented May 13, 1890.

[2? v e n f 07' Qhoxlcs W. Thomaa a I M .Rfio'mw gzf/az e vsew p in UNITED STATES PATENT a citizen of the United; States, and a resident other suitable substancesas fully pointed resonant material 1). In the rim is tormed a CHARLES THOMAS, OF JERSEY crrn'nnw JERSEY, ASSIGNQR or Tworrmnns TO PHILIP VAN VOLKENBURGH, JR, or NEW YORK, 'N. Y.

S H EAVE.

. srnomonrron forming pm of Letters Patent No. 427,810, dated May 13, 1850.

Application filed October 26,1889.

To all whom it may concern: I

Be it knownthat I, CHA LEs W. TnoMAs,

of Jersey City, in the count'yof Hudson and State of New Jersey, have invented a new and useful Improvementin Sheaves and the Like, of which the following is a specification.

My invention has reference to improvements in sheaves, gear-wheels, and the like, and has for its object to provide means for deadening the noise or .rattling' usually accompanying the running of. metallic sheaves or gear-wheel's in which the rim and hub are cast integral or are united directly to each other, my said invention being esp'eciallyapplicable to sheaves such as are used in cable railways for supporting the cable, and serves to obviate the usualnoiseor rattling caused by the passage of the cable over the sheaves.

To the above-stated end my invention consists, essentially, in-a, sheave or the like having its rim separated from the hub by an interposed cushion of non-resonant materialsuch as lead, Babbitt metal, gutia-percha, or-

out in the following specificationand claims, and illustrated in the accompanying drawings, in which' Figure 1 represents a face'view of a sheave for cable railways constructed according to my invention, part of the rim being removed. Fig.2 is a central section of the same. Figs. 3 and 4 illustrate detail parts. Fig. 5 is a face view of a modification, part of the rim being broken away. Fig. 6 is aface View of a second modification with part of the rim' and cushion removed. Fig. 7 is a sectional elevatio'nof Fig. 6-, Fig. 8 is a sectional plan or top view of Fig. 7. Fig. 9 isasimilar View showing a gear-wheel constructed according to my invention. Fig. 10 is a central transverse section of Fig. '9.

Similar letters indicatecorrespondin g parts.

In the drawings, referring at present to Figs, 1, 2, 3, and 4, the letter A designates the hub of a sheave adapted for cable railways. B B are the arms,-preferably cast integral with the hubto form a spider, and C is a separate rim constructed to be united to the arms to gether with an interposed cushion of nonresonant material.

rim-sections, as at d d.

Serial No. 328,260- (No model.)

continuous circumferential groove or socket a, which maybe providedwith tapering walls. At suitable distances apart, corresponding to the distance between the arms B. B, one wall of the socket is cut away to form openings 12 b, permitting the insertion of the arms into the groove or socket. The arms may be pro vided at their ends with suitable heads -c,'ta-

pered to correspond to the grooveor socket a and of such dimensions as to leave spaces on three sides between said arms and the rims for the interposition of the cushion of nonv The arms having been passed through the openings and into the groove or socket, the spider. is turned to bring the heads 0. into positions intermediate of the sockets, whereupon the non-resonant material in a melted state is cast into the space or mold formed between the arms and the rim, suificient material being poured or forced in to bring the same flush with the outer face of the rim-that is, to fill the openings b b whereby any sliding or rotary movement of the rim with respect to the arms is prevented. It will be readily seen that ihehub is entirely insulated or out of direct contact with'the rim through the medium of the non-resonant cushion. Consequently there will be no noise or rattling as the cable runs over the pulley.

After the rim and spider have been united, as described, the crown of the pulley may be made true in the usual manner. Various other modes may be followed in the general construction .of thepulley, sheave, or gear. For instance, in Figs. 5 and 6 I have shown the rim formed of two sections C and 0 In this case the rim-sections are each provided with a continuous groove or socket a a formed in their adjoining sides, said grooves or sockets being wedge-shaped or tapering.

The arms B B are provided with similar wedge-shaped heads 0' c of such dimensions as to leave space on all sides for the interposition of the cushion, and a suitable space is also left betweenthe' adjoining sides of th In Figs. 7 and8 Ihave shown the arms B B terminating in a continuous ring 0', to which the ring-sections are united as before. In this form less material is required for the cushion. To prevent shifting of the rim in both to deaden the sound and to form an electrically-insulated pulley or sheave.

\Vhat I claim as new, and desire to secure by Letters Patent, is-.

l. A sheave or the like having its rim separated from the hub byan interposed cushion' of non-resonant material, said cushion serving to attach the rim tothe hub, substantially as described.

2. A sheave or the like having its rim separatedfrom the hub by an interposed material, serving to entirely insulate the rim from the hub and to unite the two, substantially as described.

8. A sheave orthe like having-its rim entirelyseparatedfrom the hub by an interposed non-resonant and insulating material, said material also rigidly uniting the rim and the hub, substantially as described.

4. The combination, with the 'hub and its arms, of a rim. provided with an internal socket and with transverse openings for the passage of the arms into the sockets, and an interposed uniting material, substantially as described.

5. Asheave or the like consisting of a sectional rim, each section containing sockets, arms extending into said sockets, and an interposed uniting material adapted to entirely insulate the arms from the rim, substantially as described.

(3. A sheave or the like having; its rim in two eircun'iferential sections, each section being" provided with dovetailed grooves and its arms provided with dovetailed terminations, and an interposed cushion uniting the rim to the arms and insulating the rim from the hub, substantially as described.

In testimony that I claim the foregoing" as my invention I have signed my name, in presence of two Witnesses, this 19th day of October, 1889.

CHARLES W. 'lll()i\lAS.

Witnesses:

A. FABER DU FAUR, JR,

WILLIAM MILLER. 

